The front-end form label sends a POST request, the server inherits the HttpServlet with the Java class, and returns the data

1. Form form submission:

<form action= "Http://localhost:8080/test/Login" method= "POST" >

User: <input type= "text" name= "username"/><br/>

Password: <input type= "password" name= "password"/><br/>

<input type= "Submit" value= "Login"/>

</form>

2, JS submitted:
(1) Added: <script type= "Text/javascript" src= "Assets/jquery-2.1.1.js" ></SCRIPT>, can be used in other, note to have $.post, some version does not ；

(2) var test={

Name: "Me",

Password: "Password"

};

$.post ("Http://localhost:8080/test/Login",

Test, function (text, status) {alert (text);});

3, Form+js submit:

The button in the form tag must be added: type= "button", followed by the same as above 2;

4. Server:

The Dopost () method in the Java class that inherits HttpServlet:

Request.setcharacterencoding ("UTF-8");

Response.setcharacterencoding ("UTF-8");

SYSTEM.OUT.PRINTLN ("Connect to Server" +request. GetParameter ("name") + "," +request. GetParameter ("Password" ));

Add Database Operations Database

PrintWriter out = response. getwriter ();

Out.write ("link Server success!"); //Return data to page

Out.close ();

The

Front-end form label sends a POST request, and the server inherits HttpServlet with the Java class and returns the data